L-605™ is a nonmagnetic cobalt-based chromium-tungstennickel alloy that has excellent corrosion and oxidation resistance, and high strength at both room and elevated
temperatures. Through work hardening, high strength levels can be obtained. L-605™ has a minimal heat treatment response, but can be used in the cold worked and aged
condition. Applications include medical implant devices, springs, valves, and engine components for the aerospace industry. As a result of its high tungsten content, L-605TM is radiopaque, which is beneficial for implant medical devices, such as stents.
Because of the alloy’s high work hardening rate, only minimal reductions can be taken before solution annealing will be required. L-605TM is very resistant to oxidation and scaling at elevated temperatures, and is nonmagnetic in all conditions. L-605™ is produced by vacuum induction melting followed by electroslag remelting (VIM-ESR), and as such, has a low nonmetallic inclusion level.
Available Sizes:
L-605™ is available from Hamilton Precision Metals as strip product. Contact HPM Sales Department for size capability information. The material corresponds to UNS R30605.
Nominal Composition
| L-605™ NOMINAL COMPOSITION |
| Nickel |
10%
|
| Tungsten |
15%
|
| Chromium |
20%
|
| Iron |
3.00% Max
|
| Manganese |
1.5%
|
| Carbon |
0.10%
|
| Silicon |
1.00% Max
|
| Cobalt |
Balance
|
Mechanical Properties
| L-605™ MECHANICAL PROPERTIES |
|
ANNEALED |
| Ultimate Tensile Strength |
165,000 PSI |
| Yield Strength (0.2% Offset) |
85,000 PSI |
| Elongation in 2”+ |
30%
|
| Hardness |
91 HRb
|
| Modulus of Elasticity |
35.3 X 10^
6 PSI
|
+The measured elongation will be less as thickness decreases to 0.003” and less
These values may be adjusted by control of process variables – consult HPM for desired values.
Physical Properties
| L-605™ PHYSICAL PROPERTIES |
| Density |
0.330 lbs/cu.in. |
| Melting Point (Approx.) |
2500°F |
| Electrical Resistivity @ R.T. |
88.7 Microhm·cm |
|
Thermal Expansion Coefficient (RT to 200°C)
|
12.9 PPM/°C
|
| Thermal Conductivity @ R.T. |
12.7 W/m·K
|
Typical values to guide alloy selection but are not a guarantee of minimum or maximum.